migrate to next_key

[LGrishin]

migrate to next_key

[codecov]

Codecov Report

Attention: Patch coverage is 37.50000% with 15 lines in your changes missing coverage. Please review.

Project coverage is 73.01%. Comparing base (fda4070) to head (4f9509c).
Report is 4 commits behind head on master.

Files with missing lines	Patch %	Lines
src/bin/malloc.rs	0.00%	13 Missing ⚠️
src/next.rs	66.66%	1 Missing ⚠️
src/ops.rs	85.71%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #200      +/-   ##
==========================================
- Coverage   73.20%   73.01%   -0.20%     
==========================================
  Files          16       16              
  Lines         642      641       -1     
==========================================
- Hits          470      468       -2     
- Misses        172      173       +1     

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[0crat]

@LGrishin It is not a good practice to name Git branches like "lgrishin-impl-benches". As per our policy, this naming convention violation incurs a -12 point penalty. For future reference, please name your branch after the ticket number you're working on, such as "199". This helps maintain consistency and clarity in our repository. Your current balance stands at -8. Let's aim for better branch naming moving forward.